91005373 has 4 divisors (see below), whose sum is σ = 91396188. Its totient is φ = 90614560.

The previous prime is 91005371. The next prime is 91005389. The reversal of 91005373 is 37350019.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37350019 = 7 ⋅5335717.

It can be written as a sum of positive squares in 2 ways, for example, as 27436644 + 63568729 = 5238^2 + 7973^2 .

It is a cyclic number.

It is not a de Polignac number, because 91005373 - 2¹ = 91005371 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91005371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195058 + ... + 195523.

It is an arithmetic number, because the mean of its divisors is an integer number (22849047).

Almost surely, 2^91005373 is an apocalyptic number.

It is an amenable number.

91005373 is a deficient number, since it is larger than the sum of its proper divisors (390815).

91005373 is a wasteful number, since it uses less digits than its factorization.

91005373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390814.

The product of its (nonzero) digits is 2835, while the sum is 28.

The square root of 91005373 is about 9539.6736317339. The cubic root of 91005373 is about 449.8029968952.

It can be divided in two parts, 91005 and 373, that added together give a triangular number (91378 = T₄₂₇).

The spelling of 91005373 in words is "ninety-one million, five thousand, three hundred seventy-three".